﻿///
/// Copyright (c) 2008, Aaron G. Daisley-Harrison
/// All rights reserved.
/// 
/// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
/// 
/// * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
/// 
/// * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
/// 
/// * Neither the name of Daisley-Harison Software nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
/// 
/// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
/// BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
/// SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
/// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
/// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
/// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
/// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
/// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
/// 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Media.Media3D;

namespace DaisleyHarrison.Wavefront
{
    public class DefinedObject
    {
        public const string UNDEFINED = "noobject";
        public string Name { get; set; }
        public Dictionary<string,Group> Groups { get; private set;}
        private Group _currentGroup;
        public DefinedObject()
        {
            this.Groups = new Dictionary<string, Group>();
        }
        public DefinedObject(string name)
            :this()
        {
            this.Name = name;
        }
        public Group CurrentGroup
        {
            get
            {
                if (_currentGroup == null)
                {
                    if (!this.Groups.TryGetValue(Group.UNDEFINED, out _currentGroup))
                    {
                        _currentGroup = new Group(Group.UNDEFINED);
                        this.Groups.Add(Group.UNDEFINED, _currentGroup);
                    }
                }
                return _currentGroup;
            }
            set
            {
                _currentGroup = value;
            }
        }
        private const string TO_STRING_FORMAT = "Object{{ Name=\"{0}\", Groups={1}}}";
        public override string ToString()
        {
            return string.Format(TO_STRING_FORMAT, this.Name, this.Groups.Count);
        }
        public Model3D BuildModel()
        {
            if (this.Groups.Count == 1)
            {
                foreach (Group group in this.Groups.Values)
                {
                    return group.BuildModel();
                }
                throw new InvalidOperationException();
            }
            else
            {
                Model3DGroup model3DGroup = new Model3DGroup();
                foreach (Group group in this.Groups.Values)
                {
                    model3DGroup.Children.Add(group.BuildModel());
                }
                _visual.Content = model3DGroup;
                return model3DGroup;
            }
        }
        private ModelVisual3D _visual;
        public ModelVisual3D BuildVisual()
        {
            if (_visual == null)
            {
                _visual = new ModelVisual3D();
                _visual.Content = BuildModel();
            }
            return _visual;
        }
    }
}
